Refractory composition.



THOMAS MOMAHON, OF PHILADELPHIA, PENNSYLVANIA.

REFRACTORY COMPOSITION.

No Drawing.

Specification of Letters Patent.

Application filed November 22, 1909. Serial No. 529,190.

Patented July 26,1910.

To all whom it may concern:

Be it known that I, THOMAS MCMAHON,

a citizen of the United States residing at Philadelphia, in the county of lhiladelphia and State of Pennsylvania, have invented certain new and useful Improvements in Refractory Compositions, of which the following is a specification.

My invention relates to an improved refractory composition, the object of the invention being to provide a composition of this character which ma be made into bricks or lumps and place in fire chambers of various kll'ldS, especially in chambers where high temperatures are attained and which will most eflectually withstand the heat for a long period of time. 7

The composition consists of the following ingredients combined in substantially the proportions stated:

clay L; 52 per cent. Cement 36 per cent. Sand- 8 per cent. Salt AZ 4 per cent.;

In mixing the composition the clay is first pulverized and dried. The sand is then thoroughly mixed with the dry pulverized clay. The cement is then added and thoroughly mixed with the clay and sand. The

salt is then dissolved in a sufficient quantity of water and this salt water is mixed with the clay, sand, and cement, forming a plastic mass which is molded and left to dry. The clay forms the base of the composition. The cement acts as a hardener. The sand serves to se arate the clay to form a good mixture an the salt aids in the hardening of the brick more particularly after the brick is put 1n the furnace.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is A refractory lining for fire boxes, consisting of 52 per cent. of pulverized with 36 er cent. of cement, 8 per cent. 0 n nd, an 4 per cent. of salt, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS McMAHON.

Witnesses:

R. H. KRENKEL, C. E. POTTS. 

